git.zerfleddert.de Git - fpga-games/blob - galaxian/t80_ip/T80_Pack.vhd

   1 -- ****
   2 -- T80(b) core. In an effort to merge and maintain bug fixes ....
   3 --
   4 --
   5 -- Ver 300 started tidyup
   6 -- MikeJ March 2005
   7 -- Latest version from www.fpgaarcade.com (original www.opencores.org)
   8 --
   9 -- ****
  10 --
  11 -- Z80 compatible microprocessor core
  12 --
  13 -- Version : 0242
  14 --
  15 -- Copyright (c) 2001-2002 Daniel Wallner (jesus@opencores.org)
  16 --
  17 -- All rights reserved
  18 --
  19 -- Redistribution and use in source and synthezised forms, with or without
  20 -- modification, are permitted provided that the following conditions are met:
  21 --
  22 -- Redistributions of source code must retain the above copyright notice,
  23 -- this list of conditions and the following disclaimer.
  24 --
  25 -- Redistributions in synthesized form must reproduce the above copyright
  26 -- notice, this list of conditions and the following disclaimer in the
  27 -- documentation and/or other materials provided with the distribution.
  28 --
  29 -- Neither the name of the author nor the names of other contributors may
  30 -- be used to endorse or promote products derived from this software without
  31 -- specific prior written permission.
  32 --
  33 -- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  34 -- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  35 -- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  36 -- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
  37 -- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  38 -- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  39 -- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  40 -- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  41 -- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  42 -- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  43 -- POSSIBILITY OF SUCH DAMAGE.
  44 --
  45 -- Please report bugs to the author, but before you do so, please
  46 -- make sure that this is not a derivative work and that
  47 -- you have the latest version of this file.
  48 --
  49 -- The latest version of this file can be found at:
  50 --      http://www.opencores.org/cvsweb.shtml/t80/
  51 --
  52 -- Limitations :
  53 --
  54 -- File history :
  55 --
  56
  57 library IEEE;
  58 use IEEE.std_logic_1164.all;
  59
  60 package T80_Pack is
  61
  62         component T80
  63         generic(
  64                 Mode : integer := 0;    -- 0 => Z80, 1 => Fast Z80, 2 => 8080, 3 => GB
  65                 IOWait : integer := 0;  -- 1 => Single cycle I/O, 1 => Std I/O cycle
  66                 Flag_C : integer := 0;
  67                 Flag_N : integer := 1;
  68                 Flag_P : integer := 2;
  69                 Flag_X : integer := 3;
  70                 Flag_H : integer := 4;
  71                 Flag_Y : integer := 5;
  72                 Flag_Z : integer := 6;
  73                 Flag_S : integer := 7
  74         );
  75         port(
  76                 RESET_n         : in std_logic;
  77                 CLK_n           : in std_logic;
  78                 CEN                     : in std_logic;
  79                 WAIT_n          : in std_logic;
  80                 INT_n           : in std_logic;
  81                 NMI_n           : in std_logic;
  82                 BUSRQ_n         : in std_logic;
  83                 M1_n            : out std_logic;
  84                 IORQ            : out std_logic;
  85                 NoRead          : out std_logic;
  86                 Write           : out std_logic;
  87                 RFSH_n          : out std_logic;
  88                 HALT_n          : out std_logic;
  89                 BUSAK_n         : out std_logic;
  90                 A                       : out std_logic_vector(15 downto 0);
  91                 DInst           : in std_logic_vector(7 downto 0);
  92                 DI                      : in std_logic_vector(7 downto 0);
  93                 DO                      : out std_logic_vector(7 downto 0);
  94                 MC                      : out std_logic_vector(2 downto 0);
  95                 TS                      : out std_logic_vector(2 downto 0);
  96                 IntCycle_n      : out std_logic;
  97                 IntE            : out std_logic;
  98                 Stop            : out std_logic
  99         );
 100         end component;
 101
 102         component T80_Reg
 103         port(
 104                 Clk                     : in std_logic;
 105                 CEN                     : in std_logic;
 106                 WEH                     : in std_logic;
 107                 WEL                     : in std_logic;
 108                 AddrA           : in std_logic_vector(2 downto 0);
 109                 AddrB           : in std_logic_vector(2 downto 0);
 110                 AddrC           : in std_logic_vector(2 downto 0);
 111                 DIH                     : in std_logic_vector(7 downto 0);
 112                 DIL                     : in std_logic_vector(7 downto 0);
 113                 DOAH            : out std_logic_vector(7 downto 0);
 114                 DOAL            : out std_logic_vector(7 downto 0);
 115                 DOBH            : out std_logic_vector(7 downto 0);
 116                 DOBL            : out std_logic_vector(7 downto 0);
 117                 DOCH            : out std_logic_vector(7 downto 0);
 118                 DOCL            : out std_logic_vector(7 downto 0)
 119         );
 120         end component;
 121
 122         component T80_MCode
 123         generic(
 124                 Mode   : integer := 0;
 125                 Flag_C : integer := 0;
 126                 Flag_N : integer := 1;
 127                 Flag_P : integer := 2;
 128                 Flag_X : integer := 3;
 129                 Flag_H : integer := 4;
 130                 Flag_Y : integer := 5;
 131                 Flag_Z : integer := 6;
 132                 Flag_S : integer := 7
 133         );
 134         port(
 135                 IR                      : in  std_logic_vector(7 downto 0);
 136                 ISet                    : in  std_logic_vector(1 downto 0);
 137                 MCycle                  : in  std_logic_vector(2 downto 0);
 138                 F                       : in  std_logic_vector(7 downto 0);
 139                 NMICycle                : in  std_logic;
 140                 IntCycle                : in  std_logic;
 141                 MCycles                 : out std_logic_vector(2 downto 0);
 142                 TStates                 : out std_logic_vector(2 downto 0);
 143                 Prefix                  : out std_logic_vector(1 downto 0); -- None,BC,ED,DD/FD
 144                 Inc_PC                  : out std_logic;
 145                 Inc_WZ                  : out std_logic;
 146                 IncDec_16               : out std_logic_vector(3 downto 0); -- BC,DE,HL,SP   0 is inc
 147                 Read_To_Reg             : out std_logic;
 148                 Read_To_Acc             : out std_logic;
 149                 Set_BusA_To             : out std_logic_vector(3 downto 0); -- B,C,D,E,H,L,DI/DB,A,SP(L),SP(M),0,F
 150                 Set_BusB_To             : out std_logic_vector(3 downto 0); -- B,C,D,E,H,L,DI,A,SP(L),SP(M),1,F,PC(L),PC(M),0
 151                 ALU_Op                  : out std_logic_vector(3 downto 0);
 152                         -- ADD, ADC, SUB, SBC, AND, XOR, OR, CP, ROT, BIT, SET, RES, DAA, RLD, RRD, None
 153                 Save_ALU                : out std_logic;
 154                 PreserveC               : out std_logic;
 155                 Arith16                 : out std_logic;
 156                 Set_Addr_To             : out std_logic_vector(2 downto 0); -- aNone,aXY,aIOA,aSP,aBC,aDE,aZI
 157                 IORQ                    : out std_logic;
 158                 Jump                    : out std_logic;
 159                 JumpE                   : out std_logic;
 160                 JumpXY                  : out std_logic;
 161                 Call                    : out std_logic;
 162                 RstP                    : out std_logic;
 163                 LDZ                     : out std_logic;
 164                 LDW                     : out std_logic;
 165                 LDSPHL                  : out std_logic;
 166                 Special_LD              : out std_logic_vector(2 downto 0); -- A,I;A,R;I,A;R,A;None
 167                 ExchangeDH              : out std_logic;
 168                 ExchangeRp              : out std_logic;
 169                 ExchangeAF              : out std_logic;
 170                 ExchangeRS              : out std_logic;
 171                 I_DJNZ                  : out std_logic;
 172                 I_CPL                   : out std_logic;
 173                 I_CCF                   : out std_logic;
 174                 I_SCF                   : out std_logic;
 175                 I_RETN                  : out std_logic;
 176                 I_BT                    : out std_logic;
 177                 I_BC                    : out std_logic;
 178                 I_BTR                   : out std_logic;
 179                 I_RLD                   : out std_logic;
 180                 I_RRD                   : out std_logic;
 181                 I_INRC                  : out std_logic;
 182                 SetDI                   : out std_logic;
 183                 SetEI                   : out std_logic;
 184                 IMode                   : out std_logic_vector(1 downto 0);
 185                 Halt                    : out std_logic;
 186                 NoRead                  : out std_logic;
 187                 Write                   : out std_logic
 188         );
 189         end component;
 190
 191         component T80_ALU
 192         generic(
 193                 Mode   : integer := 0;
 194                 Flag_C : integer := 0;
 195                 Flag_N : integer := 1;
 196                 Flag_P : integer := 2;
 197                 Flag_X : integer := 3;
 198                 Flag_H : integer := 4;
 199                 Flag_Y : integer := 5;
 200                 Flag_Z : integer := 6;
 201                 Flag_S : integer := 7
 202         );
 203         port(
 204                 Arith16         : in  std_logic;
 205                 Z16             : in  std_logic;
 206                 ALU_Op          : in  std_logic_vector(3 downto 0);
 207                 IR              : in  std_logic_vector(5 downto 0);
 208                 ISet            : in  std_logic_vector(1 downto 0);
 209                 BusA            : in  std_logic_vector(7 downto 0);
 210                 BusB            : in  std_logic_vector(7 downto 0);
 211                 F_In            : in  std_logic_vector(7 downto 0);
 212                 Q               : out std_logic_vector(7 downto 0);
 213                 F_Out           : out std_logic_vector(7 downto 0)
 214         );
 215         end component;
 216
 217 end;